Oats and ducks.

Could oats be used as a source of food for ducks? We had about 5 acres planted this season around our blind. We never got around to flooding it but we didnt know if next we should flood oaks or millet. We found oats were a lot easy to get than millet and quite a bit cheaper. I would think ducks would eat oats. I noticed that they head of oats looked similar to wheat or even millet a bit more of long grain than a small grain from what I noticed.